Voigtländer has unveiled a new adapter, which allows M-mount lenses to be attached to Sony E-mount bodies and reduces the lenses' minimum focus distance courtesy of a 4mm helicoid extension. Weighing in at 125g, the new Voigtländer adapter has a diameter of 62.7mm and a 24x36mm frame coverage, making it fully compatible with the full-frame Sony Alpha A7 and A7R cameras..The company has also published a handy table showing the change in focusing range across a number of Voigtländer and Zeiss lenses. The adapter will go on sale in December.